Data Sheet
R/T characteristics
R/T No.
4003 4012 4901
T (°C) B
25/100
= 4450 K B
25/100
= 4355 K B
25/100
= 3950 K
R
T
/R
25
α (%/K) R
T
/R
25
α (%/K) R
T
/R
25
α (%/K)
55.0 103.81 6.8 115.76 7.5 87.89 7.1
50.0 73.707 6.7 80.102 7.2 61.759 6.9
45.0 52.723 6.6 56.067 7.0 43.934 6.7
40.0 37.988 6.5 39.677 6.8 31.618 6.5
35.0 27.565 6.4 28.374 6.6 23.006 6.3
30.0 20.142 6.2 20.496 6.4 16.915 6.1
25.0 14.801 6.1 14.949 6.2 12.555 5.9
20.0 10.976 5.9 11.004 6.0 9.4143 5.7
15.0 8.1744 5.8 8.1721 5.9 7.1172 5.5
10.0 6.1407 5.7 6.1208 5.7 5.4308 5.4
5.0 4.6331 5.5 4.6219 5.5 4.1505 5.2
0.0 3.5243 5.4 3.5176 5.4 3.2014 5.0
5.0 2.6995 5.3 2.6973 5.2 2.5011 4.9
10.0 2.0831 5.1 2.0834 5.1 1.9691 4.7
15.0 1.6189 5.0 1.6205 5.0 1.5618 4.6
20.0 1.2666 4.9 1.2689 4.8 1.2474 4.5
25.0 1.0000 4.7 1.0000 4.7 1.0000 4.3
30.0 0.78351 4.6 0.79302 4.6 0.808 4.2
35.0 0.62372 4.5 0.63266 4.5 0.6569 4.1
40.0 0.49937 4.4 0.50765 4.3 0.5372 4.0
45.0 0.40218 4.3 0.40961 4.2 0.44235 3.9
50.0 0.32557 4.2 0.33229 4.1 0.3661 3.8
55.0 0.26402 4.1 0.27096 4.0 0.30393 3.7
60.0 0.21527 4.0 0.22206 3.9 0.25359 3.6
65.0 0.17693 3.9 0.18287 3.8 0.21283 3.5
70.0 0.14616 3.8 0.1513 3.7 0.17942 3.4
75.0 0.12097 3.7 0.12574 3.7 0.15183 3.3
80.0 0.10053 3.7 0.10496 3.6 0.12901 3.2
85.0 0.083761 3.6 0.087977 3.5 0.11002 3.1
90.0 0.070039 3.5 0.074045 3.4 0.094179 3.1
95.0 0.058937 3.4 0.062565 3.3 0.080896 3.0
100.0 0.049777 3.4 0.053067 3.3 0.069722 2.9
105.0 0.042146 3.3 0.045177 3.2 0.060397 2.9
110.0 0.035803 3.2 0.038597 3.1 0.052493 2.8
115.0 0.030504 3.2 0.03309 3.0 0.045733 2.7
120.0 0.026067 3.1 0.028464 3.0 0.039963 2.7
125.0 0.022332 3.0 0.024564 2.9 0.035059 2.6
130.0 0.019186 3.0
0.030844 2.6
135.0 0.016515 2.9
0.027192 2.5
140.0 0.014253 2.9
0.024034 2.4
145.0 0.012367 2.8
0.021285 2.4
150.0 0.010758 2.8
0.018895 2.4
155.0 0.0093933 2.7
0.016813 2.3
Temperature measurement and compensation B57891M
Leaded NTC thermistors, lead spacing 2.5 mm M891
Page 10 of 23Please read Cautions and warnings and
Important notes at the end of this document.